EASY
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A boat moves downstream at the rate of 2 km in 12 minute and upstream at the rate of 1 km in 10 minute. Find the time taken by boat to covers 3 km in still water.

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Important Questions on Ratio, Proportion and Variation

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat can go 3km upstream and 5km downstream in 55 min. It can also go 4km upstream and 9km downstream in 1hr 25min. In how much time(in hours) it will go 43.2km downstream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat goes 15 km upstream and 1012 km downstream in 3 hours 15 minutes. It goes 12 km upstream and 14 km downstream in 3 hours. What is the speed of the boat in still water?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
The time taken by a boat to travel 13 km downstream is the same as time taken by it to travel 7 km upstream. If the speed of the stream is 3 km/h, then how much time (in hours) will it take to travel a distance of 44.8 km in still water? 
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
The speed of a boat in still water is 15 km/h, and the speed of the current is 5 km/h. In how much time (in hours) will the boat travel a distance of 60 km upstream and the same distance downstream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance

Speed of a boat along with the current and against the current are 12 km/hr and 6 km/hr respectively. What is the speed of the boat (in km/hr) in still water?

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
In a stream running at 3 km/h, a motorboat goes 12 km upstream and back to the starting point in 60 min. Find the speed of the motorboat in still water.(in km/h)
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A man can row a distance of 900 meters against the stream in 12 minutes and returns to the stalling point in 9 minutes. What is the speed (in km/hr) of the man in still water?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
Abhi rows  upstream a distance of 28 km in 4 hr and rows downstream a distance of 50 km in 2 hr.To row a distance of 44.8 km still water, he will take:
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
The speed of a boat in still water is 20 km/hr. It covers a distance of 40 km upstream in 8 hours. What is the speed (in km/hr) of the stream?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance

The downstream speed of a boat is 42 km/hr and the speed of current is 3 km/hr. What is the total time (in hours) taken by the boat to cover 72 km upstream and 84 km downstream?

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A man can row a distance of 900 metres against the stream in 12 minutes and returns to the starting point in 9 minutes. What is the speed (in km/h) of the man in still water?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A sailor takes 12 hours to cover a distance of 75 kms against the current, while he takes 7.5 hours to cover the same distance in the direction of the current. What is the speed of the current? 
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat can go 20 km downstream and 30 km upstream in 2 hours 20 minutes. Also, it can go 10 km downstream and 8 km upstream in 49 minutes. What is the speed of boat downstream in km/h?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat can go 3.6km and 5.4km down stream in 54min, while it can go 5.4km upstream and 3.6km down stream in 58.5min. The time (in minutes) taken by the boat in going 10km down stream is:
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
The speed of a boat in still water is 18 km/h and the speed of the current is 6 km/h. In how much time (in hours) will the boat travel a distance of 90 km upstream and the same distance downstream?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat can go 30 km downstream and 24 km upstream in 2 hours 27 minutes. Also, it can go 20 km Iong downstream and 8 km upstream in 74 minutes. What is the speed of the boat in still water in km/h ?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat can go 10 km downstream and 8 km upstream in 49 minutes. Also, it can go 12 km downstream and 4 km upstream in 42 minutes. What is the speed of stream in km/h?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance

The speed of a stream is 3 km/hr. A boat goes 60 km and comes back to the starting point in 15 hours. What is the speed (in km/hr) of the boat in still water?

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance
A boat travels 16 km upstream in 4 hours and 12 km downstream in 6 hours. What is the speed (in km/hr) of boat in still water?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time, Speed and Distance

A boat in still water takes 15 hours to reach its destination and come back from there. In the same river, it takes 16 hours for the same journey where there is a current in the water. The difference between the speed of the boat and the river current is 15 km/hr. Find out the speed of the river?